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Chapter 52 Regulator Control
3.Registers
• REGSEL: Address 04CEh (Access: Byte, Halfword, Word)
(See “Meaning of Bit Attribute Symbols (Page No.10)” for details of the attributes.)
• Bit7-6: Reserved bit. The read value is always “0”.
• Bit5: Flash memory supply mode.
Note: Please check with the related device datasheet if this setting is supported.
• Bit4: Main Regulator supply mode.
Note: Please check with the related device datasheet if this setting is supported.
• Bit3-0: Sub-regulator voltage level
Note: The set level of the Sub-regulator voltage is only be effective in case of Main Regulator is switched
off. Otherwise (with main regulator on) the default level is applied internally by hardware to the Sub-Reg-
ulator (the register setting is not changed in this case and will be applied next time the main regulator is
switched off).
76 5 43210 bit
- - FLASHSEL MAINSEL SUBSEL3 SUBSEL2 SUBSEL1 SUBSEL0
00 0 00110
Initial value (
INIT pininput,
watchdog reset
)
XX X XXXXX
Initial value
(Software reset)
R0/WX R0/WX R/W R/W R/W R/W R/W R/W Attribute
FLASHSEL Function
0 Flash memory operation mode is 1.8V [Initial value]
1 Flash memory operation mode is 1.9V
MAINSEL Function
0 Main regulator operation mode is 1.8V [Initial value]
1 Main regulator operation mode is 1.9V
SUBSEL3-SUBSEL0 Voltage level
0111 1.9V +/- 0.1V
0110 1.8V +/- 0.1V (initial)
0101 1.7V +/- 0.1V
0100 1.6V +/- 0.1V
0011 1.5V +/- 0.1V
0010 1.4V +/- 0.1V
0001 1.3V +/- 0.1V
0000 1.2V +/- 0.1V